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Originally Posted by blue2000s
Water has 4x the heat carrying capacity and 30x the conductivity of air. So it can carry more heat and it can pull it away much faster than air can. This means it does a much better job of reducing hot spots and takes much less energy to reduce temperatures than localized airflow would. Once the heat is in the front of the car, it's easy to move it to the air efficiently. Engines would have to be heavier and physically larger than they are to air cool them directly.
It's better this way.
Now if water pump housings were not part of the engine block and easy to get to like they were before the 80s, that would be nice.
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The pump was not too difficult to get to and replace but the job is just so darn messy.
So what if I throw a turbine engine in there... How much liquid coolant do those need?
I saw a program on car designs and someone is working on an electric car with two small gas turbines turning generators.